试题与答案

探究加速度与力、质量的关系实验时,通过实验探究两个问题: (1)保持物体质量不变

题型:问答题

题目:

探究加速度与力、质量的关系实验时,通过实验探究两个问题:

(1)保持物体质量不变.测量物体在不同力的作用下的加速度.分析加速度与______的关系.

(2)保持物体所受力相同,测量不同质量的物体在该力作用下的加速度,分析加速度与______的关系.

答案:

在探究“加速度与力、质量的关系”的实验中,采用了控制变量法,

(1)保持物体质量不变.测量物体在不同力的作用下的加速度.分析加速度与力的关系.

(2)保持物体所受力相同,测量不同质量的物体在该力作用下的加速度,分析加速度质量的关系.

故答案为:(1)力(2)质量

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题型:阅读理解

阅读理解。

     On 26th January, the biggest earthquake in India took the lives of 25,000 people. In the morning,

when everybody was enjoying holiday, earthquake began.  It was about 7. 5 0n the Ritcher scale.  

"There is nothing left between the sky and the earth any more. Everything has  been pulled clown," said

one of  the villagers alive. "There is no water, no food and no one has come to help."

     Nobody clied in Pakistan, a country next to India. The city of Lahore was lucky. In   Lahore

American school, where I was studying, all of the students were safe. They were on the field, so most

children didn't feel anything. The earthquake was felt by the teachers that were on the second floor.

However, though Mrs Young was also on the second floor, she didn't feel anything. She didn't know

what happened until a teacher told her about it. Those teachers who were on the other floors had

different feelings. Mr Emond, the maths teacher from Australia, said that when the earthquake started

he thought there was something wrong with him, but then another teacher said that it was an earthquake.

After those words, Mr Emond felt better. Mrs Davis and Mr Frost didn't feel anything either.

     My mother didn't feel anything. She didn't even know that it was an earthquake till she saw a

shaking (moving from side to side) light.  My dad saw the computer shaking and then he looked out

of  the window and saw many people going out.

1. People use "Ritcher scale" to tell                .

A. where the earthquake takes place          

B. when the earthquake takes place

C. how serious the earthquake is            

D. how long the earthquake lasts

2. We learn that               from the sentence "There is nothing left between the sky and the earth any 

     more."

A. India is a large country

B. the Indian people had nothing after the earthquake

C. there is no tall building in India

D. the earthquake in India was serious

3. The city of Lahore is               .

A. in India      

B. in America        

C. in Pakistan      

D. in Australia

4. Who feels the earthquake?

A. Some teachers on the second floor.        

B. Mrs Young.

C. My mother.                          

D. Mr Frost.

5. Which of the following is TRUE?

A. I was with my parents when the earthquake happened.

B. The earthquake in the city of Lahore wasn't serious.

C. People in the city of Lahore were frightened when they knew it was an earthquake.

D. The teachers in Lahore American school were afraid of the earthquake.

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题型:单项选择题 案例分析题

男孩,5个月。突然发生呼吸困难,肝脏肿大,肺部无细湿啰音。X线示心脏左心室增大明显,左心缘搏动减弱。诊断为心内膜弹力纤维增生症。

对心内膜弹力纤维增生症,主要应用洋地黄控制心力衰竭,需长期服用,直到()

A.症状消失,X线和心电图检查恢复正常

B.症状消失,心电图检查恢复正常后1~3个月

C.症状消失,X线和心电图检查正常后3~6个月

D.症状消失,X线和心电图检查正常后7~12个月

E.症状消失,X线和心电图检查正常后1~2年

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